<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        :closable="false"
        show-icon>
      </el-alert>
      <!-- 进度条区域 -->
      <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center="">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm" label-position='top'>
        <el-tabs :tab-position="'left'" v-model="activeIndex" :before-leave='beforeTabLeave' @tab-click='tabClicked'>
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
              <el-form-item label="商品分类" prop="goods_cat">
                  <el-cascader
                    v-model="addForm.goods_cat"
                    :options="catelist"
                    :props="cateProps"
                    @change="handleChange">
                  </el-cascader>
              </el-form-item>
            </el-form-item>                                    
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框组 -->
               <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cd" v-for="(cd,i) in item.attr_vals" :key="i" border size="mini"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableDate" :key='item.attr_id'>
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers='headerObj'
              :on-success='handleSuccess'>
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex:'0',
      // 添加商品的表单数据对象
      addForm:{
        goods_name:'',
        goods_price:0,
        goods_weight:0,
        goods_number:0,
        // 商品分类数组
        goods_cat:[],
        // 图片的数组
        pics:[],
        // 商品描述内容
        goods_introduce:'',
        attrs:[]
      },
      // 验证规则
      addFormRules:{
        goods_name:[
          {required:true,message:'请输入商品名称',trigger:'blur'}
        ],
        goods_price:[
          {required:true,message:'请输入商品价格',trigger:'blur'}
        ],
        goods_weight:[
          {required:true,message:'请输入商品重量',trigger:'blur'}
        ],
        goods_number:[
          {required:true,message:'请输入商品数量',trigger:'blur'}
        ],
        goods_cat:[
          {required:true,message:'请选择分类',trigger:'blur'}
        ],
      },
      // 商品分类列表数据
      catelist:[],
      cateProps:{
        expandTrigger: 'hover',
        label:'cat_name',
        value:'cat_id',
        children:'children'
      },
      // 动态参数列表数据
      manyTableData:[],
      // 静态数据
      onlyTableDate:[],
      // 图片上传组件请求头对象
      headerObj:{
        Authorization:window.sessionStorage.getItem('token')
      },
      previewPath:'',
      previewVisible:false
    }
  },
  created(){
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList(){
      const {data:res} = await this.$http.get('categories')
      if(res.meta.status!==200)this.$message.error('获取商类数据失败')
      this.catelist=res.data
      console.log(this.catelist);
    },
    // 级联选择器变化触发
    handleChange(){
      console.log(this.addForm.goods_cat);
      if(this.addForm.goods_cat.length!==3){this.addForm.goods_cat=[]}
    },
    beforeTabLeave(activeName, oldActiveName){
      if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
        this.$message.error('请选择商品分类')
        return false
      }
    },
    async tabClicked(){
      if(this.activeIndex ==='1'){
        const{data:res}= await this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'many'}})
        if(res.meta.status!==200)this.$message.error('获取商类数据失败')
        res.data.forEach(item=>{
          item.attr_vals = item.attr_vals.length ==0 ?[]: item.attr_vals.split(' ')
        })
        this.manyTableData=res.data
      }else if(this.activeIndex==='2'){
        const{data:res}= await  this.$http.get(`categories/${this.cateId}/attributes`,{params:{sel:'only'}})
         if(res.meta.status!==200)this.$message.error('获取商类数据失败')
         console.log(res.data);
         this.onlyTableDate=res.data
      }
    },
    // 处理图片预览效果
    handlePreview(file){
      this.previewPath=file.response.data.url
      this.previewVisible=true
    },
    //处理移除图片操作 
    handleRemove(file){
      const filePath=file.response.data.tmp_path
      const i= this.addForm.pics.findIndex(x=>{x.pic===filePath})
      this.addForm.pics.splice(i,1)
      console.log(this.addForm.pics);
    },
    // 图片上传成功钩子
    handleSuccess(response){
      console.log(response);
      const picInfo ={pic:response.data.tmp_path}
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    async add(){
      this.$refs.addFormRef.validate(valid=>{
        if(!valid)this.$message.error('请填写必要的表单项')
      })
      const form= _.cloneDeep(this.addForm)
      this.addForm.goods_cat=form.goods_cat.join(',')
      this.manyTableData.forEach(item=>{
        const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals.join(' ')}
        this.addForm.attrs.push(newInfo)
      })
      this.onlyTableDate.forEach(item=>{
        const newInfo={attr_id:item.attr_id,attr_value:item.attr_vals}     
        this.addForm.attrs.push(newInfo)   
      })
      form.attrs=this.addForm.attrs
      console.log(form);
      // 发起请求添加商品
      const {data:res}= await this.$http.post('goods',form)
        if(res.meta.status!==201)this.$message.error('添加失败')
        this.$message.success('添加成功')
        this.$router.push('/goods')
    }
  },
  computed:{
    cateId(){
      if(this.addForm.goods_cat.length===3){
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang='less' scoped>
.el-checkbox{
  margin: 0;
}
.previewImg{
  width: 100%;
}
.btnAdd{
  margin: 15px 0 0 0;
}
</style>